[Bug #19259] `Data#with` should call `initialize` method

1 files changed, 16 insertions, 0 deletions

diff --git a/test/ruby/test_data.rb b/test/ruby/test_data.rb
index 3cafb365ed..9380076e1b 100644
--- a/test/ruby/test_data.rb
+++ b/test/ruby/test_data.rb
@@ -217,6 +217,22 @@ class TestData < Test::Unit::TestCase
     end
   end
 
+  def test_with_initialize
+    oddclass = Data.define(:odd) do
+      def initialize(odd:)
+        raise ArgumentError, "Not odd" unless odd.odd?
+        super(odd: odd)
+      end
+    end
+    assert_raise_with_message(ArgumentError, "Not odd") {
+      oddclass.new(odd: 0)
+    }
+    odd = oddclass.new(odd: 1)
+    assert_raise_with_message(ArgumentError, "Not odd") {
+      odd.with(odd: 2)
+    }
+  end
+
   def test_memberless
     klass = Data.define